多源遥感揭示白鹤滩库区五里坡滑坡蓄水期形变演化与复活机制

为揭示水电站蓄水期库岸滑坡形变演变趋势及复活机制,基于白鹤滩库区五里坡滑坡2021年1月—2022年8月共73景Sentinel-1影像,采用SBAS-InSAR技术提取蓄水期二维形变,并使用无人机航测技术对滑坡及次生灾害痕迹进行调查,此外利用GNSS位移实测数据对InSAR形变结果进行对比与补充,综合3种技术结果与库区水位实测数据、地质资料对五里坡滑坡进行精细化分析.结果表明:(1)五里坡滑坡形变与库区蓄水存在强相关性.在蓄水前无明显形变而在蓄水后一个月便发生可见形变,随着水位上涨,坡度方向InSAR形变速率最高达到-153 mm/a,雷达视线方向InSAR最大累积形变量达到121 mm,并表现为由下部形变逐渐带动上部形变的牵引式滑坡特征.结合水位实测数据与GNSS位移监测数据发现滑坡形变与蓄水期水位变化吻合度较高.(2)现场地质调查表明五里坡滑坡为上硬下软的反倾岩质边坡,且坡面岩体风化强烈,下部岩体容易受到库水作用软化发生压缩变形进而导致坡体沿风化层发生牵引式滑动.研究结果可为库岸滑坡蓄水期监测和防治提供科学依据.

超声诊断肺源性心脏病不同阶段左心室收缩期形变的应用价值

目的超声诊断肺源性心脏病不同阶段左心室收缩期形变的应用价值。方法选择新疆医科大学第六附属医院收治的70例肺源性心脏病病人为观察组,另选择行健康体检的无心肺疾病史者70名为对照组。根据观察组临床分期分为肺心功能代偿期组(31例),呼吸困难期组(18例),右心衰竭期亚组(17例),全心衰竭期亚组(4例)。采用彩色多普勒超声仪予以检查,观察心肌应变指标和二维超声心动图指标。结果观察组和全心衰竭期亚组及右心衰竭期亚组心肌收缩期峰值纵向应变(SL)值高于对照组,心肌收缩期峰值径向应变(SR)值低于对照组(P<0.05)。观察组和全心衰竭期亚组及右心衰竭期亚组左室射血分数(LVEF)低于对照组(P<0.05),观察组和全心衰竭期亚组及右心衰竭期亚组左室质量(LVM)、左房容积(LAV)高于对照组(P<0.05)。结论超声诊断肺源性心脏病病人心肌收缩机械性受损主要表现为以SL、SR为主的心肌应变能力降低和以LVM、LAV为主的质量、容积增加,且变化趋势与病人病情进展一致。

Short-term warning and integrity monitoring algorithm for coal mine shaft safety

A new short-term warning and integrity monitoring algorithm was proposed for coal mine shaft safety. The Kalman filter (KF) model was used to extract real global positioning system (GPS) kinematic deformation information. The short-term warning model was built by using the two-side cumulative sum (CUSUM) test, which further improves the warning system reliability. Availability (the minimum warning deformation, MWD), false alarm rate (the average run length, ARL), missed rate (the warning delay, WD) and the relationships among them were analyzed and the method choosing warning parameters is given. A test of a deformation simulation platform shows that the warning algorithm can be effectively used for steep deformation warning. A field experiment of the Malan mine shaft in Shanxi coal area illustrates that the proposed algorithm can detect small dynamic changes and the corresponding occurring time. At given warning thresholds (MWD is 15 mm and ARL is 1000),the detected deformations of two consecutive days’ deformation sequences with the algorithm occur at the 705th epoch (705 s) and the 517th epoch (517 s), respectively.

Viscoelastic model for asphalt mixture under repeated haversine load

The series-wound dashpot of the Burgers model is modified by introducing the strain hardening parameter, and the new model is considered as a combination of the modified dashpot and the Van Der Poel model. The cyclical pulse load consisting of a haversine load time and a rest period is adopted to simulate the actual vehicle load, and the permanent strain model under the repeated load is derived from the rheological and viscoelastic theories. Subsequently, the model is validated by the results of uniaxial repeated load permanent deformation tests of three asphalt mixtures. It is indicated that the proportion of residual viscoelastic strain to permanent strain decreases gradually with the load cycles, and only accounts for 2% to 3% during most of the loading period. If the rest period is long, the residual viscoelastic strain is little. The rest period of the actual vehicle load may be long enough, so the residual viscoelasticity can be ignored and the simplified model can be obtained. The proposed model can well describe the permanent deformation of asphalt mixtures under repeated load.

Study on Fruit Quality, Phenological Phases and Shoot Histomorphology of a New Bud Mutant Line, ‘Chuanzao Loquat’

[Objective] This study was to explore the growth characteristics and fruit quality of a new bud mutant line, ＇Chuanzao Loquat＇. [Method] Paraffin section technique combined with field investigation method were adopted to conduct com- parative analysis of shoot histomorphology and phenological phases between two Io- quat varieties, ＇Chuanzao Loquat＇ and ＇Zaozhong 6＇. [Result] ＇Chuanzao Loquat＇ branched out and unfolded leaves about half to a month earlier than ＇Zaozhong 6＇; both the flowering and fruiting phases of ＇Chuanzao Loquat＇ were three months earlier than a precocious variety, ＇Zaozhong 6＇; the proportions of epidermis, cortex parenchyma, vascular tissue and medulla were 3.7%, 14.5%, 15.9% and 65.9%, re- spectively, in spdng shoots of ＇Chuanzao Loquat＇, and 3.1%, 42.5%, 6.9% and 47.5%, respectively, in ＇Zaozhong 6＇. [Conclusion] In terms of phenological phases, ＇Chuanzao Loqua＇ is earlier than ＇Zaozhong 6＇, a currently widely planted precocious variety, and thus is an important germplasm resource of Ioquats.

论五脏六腑皆有胀痿

该文分析《灵枢·胀论》《素问·痿论》中脏腑胀痿理论特点,参阅历代医家论述,结合现代解剖、生理、病理及临床实践,认为五脏六腑皆有胀痿,即五脏心、肺、肝、脾、肾之胀、痿,以及六腑大肠、小肠、膀胱、三焦、胆、胃之胀、痿;瘀血、湿浊、痰饮等病理产物堆积于脏腑为脏腑胀,脏腑精血津液减少为脏腑痿;根据脏腑外形体积有无变化又分为形变期与形变前期。

Helicobacter pylori infection with intestinal metaplasia: An independent risk factor for colorectal adenomas

AIM To explore the association between Helicobacter pylori (H. pylori) infection status, intestinal metaplasia (IM), and colorectal adenomas. METHODS We retrospectively reviewed 1641 individuals aged >= 40 years who underwent physical examination, laboratory testing, C-13-urea breath testing, gastroscopy, colonoscopy, and an interview to ascertain baseline characteristics and general state of health. Histopathological results were obtained by gastric and colorectal biopsies. RESULTS The prevalence of H. pylori infection and adenomas was 51.5% (845/1641) and 18.1% (297/1641), respectively. H. pylori infection was significantly correlated with an increased risk of colorectal adenomas (crude OR = 1.535, 95% CI: 1.044-1.753, P = 0.022; adjusted OR = 1.359, 95% CI: 1.035-1.785, P = 0.028). Individuals with IM had an elevated risk of colorectal adenomas (crude OR = 1.664, 95% CI: 1.216-2.277, P = 0.001; adjusted OR = 1.381, 95% CI: 0.998-1.929, P = 0.059). Stratification based on H. pylori infection stage and IM revealed that IM accompanied by H. pylori infection was significantly associated with an increased risk of adenomas (crude OR = 2.109, 95% CI: 1.383-3.216, P = 0.001; adjusted OR = 1.765, 95% CI: 1.130-2.757, P = 0.012). CONCLUSION H. pylori-related IM is associated with a high risk of colorectal adenomas in Chinese individuals.

Prolonged high-pressure balloon angioplasty of femoropopliteal lesions：Impact on stent implantation rate and mid-term outcome

Objectives To assess the impact on stent implantation rate and mid-term outcomes of prolonged high pressure angioplasty of femoropopliteal lesions. Methods We retrospectively enrolled 620 consecutive patients from January 2011 to December 2011 （75.6 ±12.3 years, 355 males, 76.5%in Rutherford class 5-6）, referred for critical limb ischemia and submitted to prolonged high-pressure angioplasty of femoropopliteal lesions. The definition of prolonged high-pressure angioplasty includes dilation to at least 18 atm for at least 120 s. Proce-dural data, and clinical and instrumental follow-up were analyzed to assess stent implantation rate and mid-term outcomes. Results The preferred approach was ipsilateral femoral antegrade in 433/620 patients （69.7%） and contralateral cross-over in 164/620 （26.4%） and pop-liteal retrograde＋femoral antegrade in 23/620 （3.7%）. Techniques included subintimal angioplasty in 427/620 patients （68.8%） and endolu-minal angioplasty in 193/620 patients （31.2%）. The prolonged high pressure balloon angioplasty procedure was successful in 86.2%（minor intra-procedural complications rate 15.7%）, stent implantation was performed in 74 patients （11.9%）, with a significant improvement of ankle-brachial index （0.29 ±0.6 vs. 0.88 ±0.3, P〈0.01） and Rutherford class （5.3 ±0.8 vs. 0.7 ±1.9, P〈0.01）, a primary patency rate of 86.7%, restenosis of 18.6%on Doppler ultrasound and a target lesion revascularization of 14.8%at a mean follow-up of 18.1 ±6.4 months （range 1-24 months）. Secondary patency rate was 87.7%. Conclusions Prolonged high pressure angioplasty of femoropopliteal lesions appears to be safe and effective allowing for an acceptable patency and restenosis rates on mid-term.

Morphological changes and allometric growth in hatcheryreared Chinese loach Paramisgurnus dabryanus(Dabry de Thiersant, 1872)

The length-weight relationship and allometric growth patterns of hatchery-reared Chinese loach, Paramisgurnus dabryanus(Dabry de Thiersant, 1872), were determined from hatching to 60 days after hatching. A best power model was estimated for the length-weight relationship during the early life stages. Positive allometric growth for the head segment, trunk length, tail length and eye diameter was also found in the early life stages, while body depth, tail depth, tail fi n length, pectoral fi n length and barbel length displayed a negative coeffi cient. During the subsequent early developmental stage, the growth coeffi cients showed a clear and common tendency towards isometry for all measured body ratios. The allometric growth changes in Chinese loach during the early stage are possibly the result of selective organogenesis directed towards survival priorities.

Intracellular levels of calmodulin are increased in transformed cells

By using Hoechst 33342, rabbit anti calmodulin antibody ,FITC-1abeled goat anti rabbit IgG and SR101(sulfo rhodamine 101) simultaneously to stain individual normal and transformed cells, t-he micrbspectrophotometric analysis demonstrated that 3 markers' which represented the nucleus, calrnodulin and total protein respectively, could be recognized in individualj cells without interference. The phase of the cell cycle was determined by DNA content (Hoechst 33342). We found that in transformed cells (NIH3T3) tsRSV-LA90,cultured at 33 C and transformed C3H10T1/ 2 cells), the ratio of calmodulin to total protein (based on the phases of cell cycle)was higher than that in normal cells (NIH3T3 tsRSV - LA90 cells, cultured at 39C and C3H10T1/2 cells) in every cell cycle phase. This ratio increased obviously only from G1 to S phase in either normal or transformed cells. The results showed that calmodulin really increased during the transformation, and its increase was specific. In the meantime when cells proceeded from G1 to S, the intracellular calmodulin content also increased specifically.

Novel Functions of Interleukin-1 Beta in Spotted Halibut(Verasper variegatus) at Its Embryonic and Metamorphic Stages

Interleukin-lbeta （IL-1β） is a cytokine involved in the control of inflammatory responses. The functions of IL-1β have been extensively studied in many vertebrates. However, few studies focused on the functions of IL-1β in the spotted halibut （Verasper variegatus）, an endangered aquatic fish that easily suffers from bacterial and viral infections. We first cloned and sequenced the IL-1β gene from V. variegatus （VvIL-1β）. Its conservative interleukin-1 propeptide and interleukin-1/18 domains corresponding regions, characteristics of the IL-1 protein family and TA-rich motifs relating to inflammatory responses were similar to those of the IL-1β genes from other teleost and mammals. The phylogenetic analysis showed that VvIL-1β was homologous to the IL-1β gene of other vertebrates. Treatment with pathogen-associated molecular patterns （PAMPs） induced a significant and rapid up-regulation of VvIL-1β expression in the peripheral blood leukocytes （PBLs）, revealing that VvIL-1β is actively involved in the host ilmnune responses against bacterial and viral pathogens. The expression level of VvIL-1β was relatively high in the PBLs, gill, and intestine, indicating the immunological function of VvIL-1β . VvIL-1β also had interesting expression patterns at specific developmental stages, implying that the IL-1β of flatfishes may have some novel functions during embryonic development and metamorphosis. The 3D structure prediction also provided information about how VvIL-113 interacts with its receptor protein. These results suggested that VvIL-1β may have multiple functions in V. variegatus and provided us valuable information for understanding the novel functions of IL- 1β.

Response Spectrum Method for Extreme Wave Loading With Higher Order Components of Drag Force

Response spectra of fixed offshore structures impacted by extreme waves are investigated based on the higher order components of the nonlinear drag force. In this way, steel jacket platforms are simplified as a mass attached to a light cantilever cylinder and their corresponding deformation response spectra are estimated by utilizing a generalized single degree of freedom system. Based on the wave data recorded in the Persian Gulf region, extreme wave loading conditions corresponding to different return periods are exerted on the offshore structures. Accordingly, the effect of the higher order components of the drag force is considered and compared to the linearized state for different sea surface levels. When the fundamental period of the offshore structure is about one third of the main period of wave loading, the results indicate the linearized drag term is not capable of achieving a reliable deformation response spectrum.

Diurnal Variation of Tropical Cyclone Rainfall in the Western North Pacific in 2008-2010

Diurnal variation of tropical cyclone （TC rainfall in the western North Pacific （WNP） is investi gated using the high-resolution Climate Prediction Ce~ ter＇s morphing technique （CMORPH） products obtaine from the National Oceanic and Atmospheric Administra tion （NOAA）. From January 2008 to October 2010, 7 TCs and 389 TC rainfall days were reported by the Joir Typhoon Warning Center＇s （JTWC） best-track record. Th TC rain rate was partitioned using the Objective Synopti Analysis Technique （OSAT） and interpolated into Local Standard Time （LST）. Harmonic analysis was applied t analyze the diurnal variation of the precipitation. Obviou diurnal cycles were seen in approximately 70% of the TC rainfall days. The harmonic amplitude and phase of the mean TC rainfall rate vary with TC intensity, life stage, season, and spatial distribution. On the basis of intensity, tropical de- pressions （TDs） exhibit the highest precipitation variation amplitude （PVA）, at approximately 30%, while super ty- phoons （STs） contain the lowest PVA, at less than 22%. On the basis of lifetime stage, the PVA in the decaying stage （more than 37%） is stronger than that in the devel oping （less than 20%） and sustaining （28%） stages. On the basis of location, the PVA of more than 35% （less than 18%） is the highest （lowest） over the high-latitude oceanic areas （the eastern ocean of the Philippine Islands）. In ad dition, a sub-diurnal cycle of TC rainfall occurs over the high-latitude oceans. On the basis of season, the diurnal variation is more pronounced during summer and winter, at approximately 30% and 32%, respectively, and is weaker in spring and autumn, at approximately 22% and 24%, respectively.

Significance and Microscopic Analysis of Deformation in the Cultural Remains of Western Zhou Dynasty-Late Spring and Autumn Period at Daijiayuan Ruins in Huoshan,Anhui Province,China

During an excavation survey to the Daijiayuan vestige of the Western Zhou Dynasty-Late Spring and Autumn Period at Huoshan in Western Anhui,a ground crack related to tectonic movement and filled with silty fine sand was found. This phenomenon was initially confirmed to be due to seismic liquefaction. Many microscopic seismic relics,such as load structure,flow structure,cutoff plane and flotation of organic matter were found in the directional microscopic analysis of deformation. These discoveries and cognitions prove that there were two earthquake events taking place in the Western Zhou Dynasty-Late Spring and Autumn Period in this area. Above-mentioned works enrich and develop the research methods to identify prehistoric earthquake event in eastern China area to a certain extent.

Deformation Analysis Due to Early Loading of Concrete Buildings

The building industry has experienced in recent years a strong growth in demand in general and in the case of reinforced concrete buildings this increase has been more marked. This fact has also contributed to accelerate all stages of the production process of these constructions with more pronounced effects on the methodologies used in the constructive steps that influence directly the structural design of the building. Structures loaded at ever earlier ages, in which the strength and deformation properties of materials are not yet sufficiently mature. It is a variable that needs to be taken into account already in the design phase so that the concrete structure behaves within acceptable level of reliability taking into account design code recommendations for service life. To understand the importance of constructive effects and to assess its magnitude in the execution of reinforced concrete buildings, this paper presents result from nonlinear analyses using finite element method adopting an approach commonly referred as staged construction applied to a typical building found in the practice. The effects of creep and shrinkage were considered and the results obtained demonstrate that the strains due to constructive effects can, in certain cases, assume representative values which, if ignored, can lead to important pathologies in the building.

Deformation Anomalies before the February 12,2014,M_S7.3 Yutian Earthquake

The Yutian earthquake with M_S7.3 happened on February 12,2014. The precursor monitoring ability is weak in that area. We found tendency anomalies and middle- and short-term anomalies from metal pendulum tilt measurements in Hotan seismic station before the earthquake. And we also compared the anomalies with that of the M_S7.3 Yutian earthquake on March 21,2008. The tendency anomalies measured by the metal pendulum tiltmeter appeared since 2012 as tilting eastward. While the middle- and short-term anomalies were characterized by acceleration,pause and rapid change of tilt rate in two directions. The tendency anomalies of metal pendulum tilt records are the same before the two earthquakes. They both happened in the east direction. However,there are differences in duration,characteristic and earthquake intervals for the middle- and short-term anomalies.

Analysis of Sacks Body Strain Interference at Beida No.200 Station in Changping and Earthquake Case Study

The relationship between Sacks body strain deformation at Beida No. 200 station in Changping and tidal solids,atmospheric pressure and water level is analyzed in this paper. Sacks body strain deformation data before the M_S8. 0 Wenchuan earthquake is studied based on the analysis of the interference. The short-impending anomaly of the body strain deformation is considered to be reliable. The anomaly characteristics conclude:( 1) The trend anomaly as extensional change of the body strain deformations on a quasi 1 year time scale before the Wenchuan earthquake was recorded, and the accumulative amount was about 4000 × 10^(-9). Correspondingly,the short-term precursor of earthquake was manifested as an extensional abrupt change.( 2) The extensional intermittent anomalous abrupt change was recorded by body strainmeters between March1 and May 7 in 2008.( 3) Four compressional abrupt changes were recorded in the intermittent distortions recorded between April 13 and May 11.( 4) High frequency components were increased in the distortion process in May 1 to 3,5,7,and 9 to 12,caused by slow earthquakes before the Wenchuan earthquake according to wavelet analysis. The abnormal phenomena are summarized and the mechanics discussed in this paper. Strain solid tide distortions in body strain observations,the continuous repeated extensional and compressional abrupt changes accompanying these distortions,and the increase of high frequency components can be regarded as the index of short term and impending earthquake prediction,based on analysis of interference factors such as air pressure and water level.

Early Mesozoic structural deformation in the Chuandian N-S Tectonic Belt,China

The Helan-Chuandian N-S Tectonic Belt is a mantle transitional belt in China. The southem part, forming the Chuandian N-S Tectonic Belt, comprises several tectonic systems, each displaying different characteristics. The Chuandian N-S Tectonic Belt along the western margin of yangtze Block is a strike-slip tectonic belt with a series of echelon left-lateral slip faults. The strike-slip fault systems experienced two stages of structural deformation： early NW-SE striking thrust faults formed under a NE-SW compression stress field, and later sinistral strike-slip structures formed along thrust faults under a NW-SE compression stress field. Mesozoic basins developed between the left-lateral slip faults. Sedimentary facies and paleocurrent directions indicate that basin development was controlled by the strike-slip faults. The oldest strata in the Chuandian N-S Tectonic Belt constrain its formation to early Mesozoic. In fact, The slip tectonic belt formed by clockwise rotation and north-directed subduction-collision of the Yangtze Block in Late Triassic-Jurassic. The strike-slip faults that developed within the belt also formed at this time.

Wedge tectonics in South China:constraints from new seismic data

Collisional orogens form when tectonic forces amalgamte fragments of Earth’s continental lithosphere.The sutures between individual fragments,or terranes,are potential sites of weakness that facilitate subsequent continental breakup.Therefore,the lithospheric architecture of collisional orogens provides key information for evaluating the long-term evolution of the continental interior:for example,the South China Block(SCB),where the tectonic history is severely obscured by extensive surface deformation,magmatism,and metamorphism.Using new passive-source seismic models,we show a contrasting seismic architecture across the SCB,with three prominent crustal dipping structures across the Jiangnan Orogen.Combined with constraints from multi-disciplinary regional geophysical datasets,these pronounced dipping patterns are interpreted as relict wedge-like lithospheric deformation zones initiated in the fossil collisions that assembled the Yangtze Block and the SCB.The overall trend of these tectonic wedges implies successive crustal growth along paleo-continental margins and is indicative of northward subduction and docking of accretional terranes.In contrast,no such dipping structures are preserved in the Cathaysia Block,indicating a weak and reorganized lithosphere.The variations in the deformation responses across the SCB reflect the long-term modifications of the lithosphere caused by prolonged collision and extension events throughout the tectonic history of the SCB.Our results demonstrate the critical roles that suture zones played in the successive growth and evolution of the continental lithosphere.

Exact Solutions,Symmetry Reductions,Painlevé Test and Bcklund Transformations of A Coupled KdV Equation

A coupled KdV equation is studied in this manuscript. The exact solutions, such as the periodic wave solutions and solitary wave solutions by means of the deformation and mapping approach from the solutions of the nonlinear φ4 model are given. Using the symmetry theory, the Lie point symmetries and symmetry reductions of the coupled KdV equation are presented. The results show that the coupled KdV equation possesses infinitely many symmetries and may be considered as an integrable system. Also, the Palnleve test shows the coupled KdV equation possesses Palnleve property. The Backlund transformations of the coupled KdV equation related to Palnleve property and residual symmetry are shown.